Press



L. E. PECK PRESS Filed Oct. 21, 1937 2 Sheets-Sheet 1 INVENTOR. 06w (2.ad

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WITNESSES Patented Aug. 15, 1939 PATENT. OFFICE w ranss LouisE. Peck,Pittsburgh. Pa... assig'nor to Thomas Machine Manufacturing Company,Pittsburgh, Pa.. a corporation of Pennsylvania .Applicatifll mm- :1,1931, Serial No. 171,223

3 Claims.- (01. 164-23) This invention relates to power presses foroperating punches, dies and other tools and more particularly isconcerned with improved means for supporting reciprocating' parta'suchas the 5 tool slide of a power press.

Heretofore, it has been the standard practice in the construction of apower press of the character indicated to support the slide or toolholder of the press slidably. in the gibs carried in the frame. The gibsare ordinarily in two pairs positioned on opposite or opposed sides ofthe slide and are usually made adjustable to compensate for wear.Because the means for reciprocating the slide, such as an eccentric andstrap rod, are positioned immediately above. the slide, the height ofthe gibs 'is limited so that in 'the continuous use of known presses itis necessary to continuously adjust the gibs for wear in' order topreserve accurate tool movement. It has been proposed to position thegibs off-center respect to. the line of movement of the tool .the thrustof the eccentric so that the length height of the gibs can be,increased. This is said toreduce the wear between the gibs and the slideand the number of. timesthat the gibs must be adjusted in service.However, it? gives rise to the obiectionthat the thrust of the eccentricis off-center with respect to the support of the slide by the gibs sothat accurate tool alignment is so diflic'ult to maintain and wear andeven chattering are likely to occur. In addition to the foreging,lubricationof the wearing parts supportingthe slide has presenteddifliculty inasmuch as the clearance between the crank shaft. eccentric,5 slide and other parts of the usual press does not permit the use ofoil cups, and flexible tubing or other methods of lubrication provide aconstant source of wear and breakdown and further add to the cost of thepress. 1

It is the general object of my invention to avoid and overcome theforegoing and other difliculties and disadvantages of power presses andparticularlythe .supports for the slides thereof by the provision ofanimproved three-point support for 45 the slide du'ring its reciprocatingmovement, which supportinsures accurate tool alignment and reduceawear,vmaintenance and repair.

'I'heforegoing and other objects of my invention are achieved by theprovision of a power 0 press including in combination, a frame havingback, which key extends parallel with the ribs and is received in akeyway in the frame to thereby provide a three-point support fortheslide. I preferably lubricate the bearing parts by providingreservoirs inthe ribs of the slide which 5 are connected to the bearingfaces of the ribs by a, plurality of passages and I lubricate the keyand keyway by the provision of an oil channel in associationtherewithwhich is connected to an oil cup or reservoir. v v 10 For a betterunderstanding of my invention reference should be had '.to theaccompanying drawings wherein Fig. l is a side elevation ofa powerpressincorporating the principles'of my invention; Fig. 2 is a' sectionalview taken on line 15 11-11 of, Fig. 1v but shown in perspective and ona larger scale to better illustrate .my improved manner of' mounting theslide or tool holder; Fig. 3 is a vertical cross-sectional view taken online IIIIII of Fig. 2 and showing the detailsof 2o oiling the key andkeyway support for'the slide; and Fig. 4 is a vertical cross-sectionalview taken on line IV'IV of Fig. 2 and illustrating the manner oflubricating the gibbed support for the slide. 26

It will be understood that the principles f my invention can be employedin conjunction with reciprocating members of various kinds and asparticularly employed in. power presses. However, in accordance with thepatent statutes 1 30' l0 to'best receive and discharge the work iscontrolledby any suitable means, as forexainple, 40

the provision of an arcuate slot IS in the base mwmcn slidably receivesa cap screw it carrled by the frame l4 so that after adjusting the angleof the frame as desiredthe cap screw can be tightened to secure theframe rigidly to the base. r

. The frame l4 includes a standardwork-receiv ing platform or bolsterplate 20 to and from which a slide or tool holderv 22 is reciprocated bywell known crank or eccentric mechanism 24 which will not be describedin detail. The slide 22 is mounted for straight line motion to and fromthe platform 20 in spaced flanges or tip-- rights 26 which are usuallyformed integral with the frame and which terminate vertically belowtically above the platform- 2|. The flanges I. are formed with opposedinwardly directed shouldera II which receive vertically extending hard-.enedmetalsibsllwhicharesecuredinplaceby suitable means. such as capscrews, not shown. Cooperatingwith eachgibflisanotherhardened metal gibI! which is adiustablymounted for movement-to and from its associatedgib I. as by the provision of cap screws 34, and whichlikewisecanbcmovedinadirectionparalleltothenearutfaocofeachofthelibsifite toward andfrom each other, by cap screws86 carried in theflanges 2|.

The slide 22 is formed with ribs ll which 61- sngageinbearing relationwith the outer fans oftheribsll. Aline drawnbetweenthecentersoftheribsllispreferablyparalleltothecrankshaftofthepressandisinalignmentwiththedoweledorscrewedtothebackoftheslideandextendingthefulllengthoftheslideinparallel relationtothe ribs.Thekeyl|isreceivedin thekeyliandkeywayi! areofthesamelengthasthegibsll-llandtheribsllbutlparticuthe plate llandwhich is connectednear the.

upperendoftheplatewithanoilcupllbyway ofapassage.Thekeyllisformedwithaplurality of transverse slots 02 which insure theflow oilto all surfaces engaging between the key and its supportingkeyway.

With respect to the lubrication of the tribe llandflandtheribslllformlongitudinalorverticalrecessesorboresflintheribsllwhichaasshowninl'ig.4,areclosedattheirbottomsby plugs it but are connected tothe bearing faces of the ribs by a plurality of substantially horilontalducts; The upper ends of the bores 04 cannot carryoil cups as thesewould strike the slide reciprocating mechanism 24, but instead springcaps ll are utilised to close the bores andtheoilisstoredintheboresandworksoutas 18,100,014 the crankandeccentricllandverneededtothefacesoftheribsbywayofductsfl as will be understood;

It is believed that the operation of my improved mounting and thelubrication of the bearing parts will be evident fromlthe foregoingdescriptitm. The slide is provided with sliding support at threedifferent points or. areas which effect very accurate tool alignment andnoticeably reduos wear. All bearing parts are particularly welllubricated and presses constructed as herein disclosed requirematerially less maintenance attention and attendant costs than do thosehaving known types of slide support.

While I haveparticularly illustrated and described one embodiment of myinvention, it should be understood that my invention is not limitedthereto or thereby but is defined in the appended claims.

I claim 1. A power press including a box-shaped frame, a slide receivedin the box-shaped frame and including a tool car y ng portion, meansmounted at the upper end of the box-shaped frame for reciprocating theslide, vertically extending; triangularly shaped ribs on the oppositesides of the slide and extending in opposite directions adiacent thesides of the box-shaped frame, fixed gibs on the frame engaging with theback sides of the ribs, adJustable gibs carried on the frame andengaging with the front sides of the ribs, a key of rectangular cmsection secured centrally to the back of the slide and in parallelrelation with the ribs, the frame adjacent the key having a keywayformed therein and slidably receiving the key, said key and keywayhaving three large flat bearing surfaces and interengaging to hold theslide against lateral or backward displacement, said"sllde reciprocatingmeans and the tool carrying portion of the slide lying substantially ina common plane.

2. A power press including a frame, a slide received in the frame, meansfor reciprocating the slide, vertically extending ribs on opposite sidesof the slide, gibs on the frame engaging with the fill, means foradjusting the gibs toward and from each other a key secured centrally tothe back of the slide and in parallel relation with the ribs, the frameadjacent the key having a keyway associated therewith and slidablyreceiving the key. said slide ribs and said slide reciprocating meanslying substantially in a common plane.

8. A power press including a box-shaped frame, a slide received in thebox-shaped frame and including a tool carrying portion, means mounted atthe upper end of the box-shaped frame for reciprocating the slide,vertically extending ribs 0n the opposite sides of the slide adjacentthe sides of the box-shaped frame, gibson the frame slidably engagingwith the ribs, means for adjusting the gibs toward and from each otherand a key of relatively large rectangular cross section securedcentrally to the back of the slide and in parallel relation with theribs, the frame adiacent the .key having a relatively large keywayassociated therewithand slidably receiving the key.

LOUIS E. PECK.

